Reached only by helicopter, Miavana by Time + Tide is one of the world’s most exclusive private-island retreats, set on the castaway paradise of Nosy Ankao off Madagascar’s northeastern coast. Fourteen expansive seafront villas blend effortless indoor-outdoor living with private pools, butler service and floor-to-ceiling glass framing the Indian Ocean. Sustainability and science sit at the heart of the experience: guides double as researchers and guest stays directly fund conservation across a 15,000-hectare protected marine area. Snorkel and dive vivid coral reefs, track lemurs in coastal forest, walk untouched beaches and watch for whales and turtles. Barefoot, wildly luxurious and utterly remote, Miavana is the ultimate island finale to an African journey.